EXERCISE exam

QUESTION 1
change the if....else statements below to switch.....case statements:
#include
main()
{
int nom A,nom B,Selection,Value;
cout<<"enter 2 numbers:";
cin>>nomA >>nomB;
cout<<"1.addition";
cout<"2.subtraction";
cout<<"3.multiply";
cout<<"4.division";
cin>>selection;
{
if (selection ==1)
{value =nomA + nomB;}
else if (selection ==2)
{value =nomA - nomB;}
else if (selection ==3)
{value =nomA * nomB;}
else if (selection ==4)
{value =nomA / nomB}
else
cout<<"invalid selection";}
<<"the value is:"<

ANSWER:

#include

main()

{

int nom A,nom B,Selection,Value;

cout<<"enter 2 numbers:";

cin>>nomA >>nomB;

cout<<"1.addition";

cout<"2.subtraction";

cout<<"3.multiply";

cout<<"4.division";

cin>>selection;

switch (selection)

{case 1:value=nomA + nomB;break

case 2:value=nomA - nomB;break

case 3:value=nomA * nomB;break

case 4:value=nomA / nomB;break

default cout<<"invalid selection";

cout <<"the value is"<

}

return 0;

}

QUESTION 2

change for loop statement below to while loop.

#include

main()

{

int i,power 2;

for (i=1;i<=9;i++)

{

power 2= i * i;

cout<<" "<

}

}

ANSWER

#include

main()

{

int i,power 2;

while

i = 1;

while ( i <=9 )

{

power 2 = i * i;

cout <<" "<< i << "power 2" << power 2;

i++;

}

}

QUESTION 3

write a program that input 2 numbers.compare and display only the biggest number.if the numbers are same,display the numbers are same

ANSWER

#include

main()

{

int num1,num2;

cout<<"enter 2 numbers:";

cin >> nomA >> nomB;

//if...else statement

if (num 2 > num 1)

{ cout <<"num 2 is bigger than num 1";}

else if (num 2 == num 1)

{ cout <<"num 2 is same as num 1";}

else

{ cout <<"invalid selection";}

return 0;

}

QUESTION 4

write a programming using for loop that recive pricess of 3 products.calculate the price that must be paid after 10% discount is given to every customer.

ANSWER

#include

main()

{

int x,price,total discount;

for (x=1;x<4;x++)

{

cout<<"price [ "<< x << " ] : ";

cin>>price;

}

total + price;

}

cout<<"total = " << total;

discount = total * 0.01;

cout<<"discount = "<

return 0;

}

QUESTION 5

what is the output for the following program segment

I) int x=20;

for (int i=5;i<=x;i++)

{

cout <<1;

i = 1 + 4;

}

ANSWER:

5

10

15

20

II) Int mul = 1;

do

{

mul = mul * 2;

cout <<"the mul is :"<

mul+++;

}

while (mul<10)

ANSWER

1

3

7